Neil, I am looking at the image of the 1841 census not a transcription.
The ladies I mention have "Ind" in the occupation column which, in my experience, means that they have independent means; the others are clearly marked
F S or
M S indicating hat they are female or male servants. 20year-old George (can't read his surname) definitely has the occupation of M S. Workhouse inmates often listed as 'inmate' or even 'pauper'. Looking at the image you can see where the enumerator has marked the separate households. The household before them is that of a clergyman with a young family and 8 servants

; the one after is a grocer, then two pubs. Workhouses usually have many more than 6 inmates.
Genuki makes this comment about Louth work-house
After the Poor Law reforms of 1834, the Louth Poor Law Union was formed on 12 April 1837 to serve the needs of 86 local parishes. The new Union Work House was erected in 1837 on Holme Lane on the north side of Louth, just east of Grimsby Road. It was designed to accommodate 350 inmates.http://www.genuki.org.uk/big/eng/LIN/Louth/louth_workhouse.htmlHowever another site suggests that there may have been a parish workhouse in NorthGate. The houses listed are in Upgate near to Westgate. Upgate appears to be a main street in Louth. Nice pic here
http://maps.google.com.au/maps?hl=en&tab=wland here - the flickerphoto site also has a pic of the Black Bull yard which was 3 properties away from the house in question
http://www.flickr.com/photos/jkslouth/2314093073/in/set-72157601587777614However is it the right Harriet

Judith